Broadband near-infrared luminescence and tunable optical amplification around 1.55 μm and 1.33 μm of PbS quantum dots in glasses

► Optical amplification of PbS QDs in glasses at 1.55 μm is characterized for the first time. ► Using ZnS–PbO to replace PbS as precursor of PbS QDs, the size distribution of PbS QDs in glasses becomes more uniform and narrower. ► Using ZnS–PbO to replace PbS as precursor of PbS QDs, optical amplifi...

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Bibliographic Details
Published in:Journal of alloys and compounds 2011-09, Vol.509 (38), p.9335-9339
Main Authors: Dong, Guoping, Wu, Botao, Zhang, Fangteng, Zhang, Liaolin, Peng, Mingying, Chen, Dongdan, Wu, E., Qiu, Jianrong
Format: Article
Language:English
Subjects:
Amplification
Broadband
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Glass
Glassy
Infrared luminescence
Luminescence
Materials science
Nanoscale materials and structures: fabrication and characterization
Optical amplification
Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation
Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures
Physics
Precursors
Quantum dots
Size distribution
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Summary:► Optical amplification of PbS QDs in glasses at 1.55 μm is characterized for the first time. ► Using ZnS–PbO to replace PbS as precursor of PbS QDs, the size distribution of PbS QDs in glasses becomes more uniform and narrower. ► Using ZnS–PbO to replace PbS as precursor of PbS QDs, optical amplification is remarkably improved, and the possible enhancing mechanism is also discussed. Silicate glasses containing PbS quantum dots (QDs) with narrow size distribution were prepared through heat treatment. Transmission electron microscopy (TEM) results show that spherical PbS QDs are densely dispersed in the glassy matrix. Using ZnS–PbO to replace PbS as precursor of PbS QDs, the size distribution of PbS QDs in glasses becomes more uniform. Tunable infrared luminescence from 1100 to 2200 nm has been obtained by controlling the glassy matrix and preparation parameters. Obvious optical amplification at communication windows of 1.55 μm and 1.33 μm is probed, and the PbS QDs doped glasses using ZnS–PbO as precursor exhibit larger optical amplification. The PbS QDs doped glasses with intense optical amplification are considered to be promising candidate as gain medium for broadband fiber amplifier and tunable fiber laser.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2011.07.030